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How to select unique records by SQL - Stack Overflow When I perform SELECT * FROM table I got results like below: 1 item1 data1 2 item1 data2 3 item2 data3 4 item3 data4 As you can see, there are dup records from column2 (item1 are dupped) So how co
mysql - SELECT * WHERE NOT EXISTS - Stack Overflow SELECT * from employees WHERE NOT EXISTS (SELECT name FROM eotm_dyn) So basically I have one table with a list of employees and their details Then another table with some other details, including their name Where there name is not in the eotm_dyn table, meaning there is no entry for them, I would like to see exactly who they are, or in other words, see what exactly is missing The above
sql - MySQL SELECT only not null values - Stack Overflow Is it possible to do a select statement that takes only NOT NULL values? Right now I am using this: SELECT * FROM table And then I have to filter out the null values with a php loop Is there a
Is there an onSelect event or equivalent for HTML lt;select gt;? <select onChange="javascript:doSomething();"> <option>A< option> <option>B< option> <option>C< option> < select> Now, doSomething() only gets triggered when the selection changes I want to trigger doSomething() when the user selects any option, possibly the same one again I have tried using an "onClick" handler, but that gets triggered before the user starts the selection process So, is
sql server - INSERT INTO vs SELECT INTO - Stack Overflow The simple difference between select Into and Insert Into is: --> Select Into don't need existing table If you want to copy table A data, you just type Select * INTO [tablename] from A
How to select the last record of a table in SQL? - Stack Overflow This is a sample code to select all records from a table Can someone show me how to select the last record of that table? select * from table When I use: SELECT * FROM TABLE ORDER BY ID DESC LIMI
sql - Which is faster best? SELECT - Stack Overflow SELECT column1, colum2, column3, etc FROM TABLE Does the efficiency really matter in this case? I'd think SELECT * would be more optimal internally if you really need all of the data, but I'm saying this with no real understanding of database I'm curious to know what the best practice is in this case UPDATE: I probably should specify that the only situation where I would really want to do a
HTML Form: Select-Option vs Datalist-Option - Stack Overflow I was wondering what the differences are between Select-Option and Datalist-Option Is there any situation in which it would be better to use one or the other? An example of each follows: Select-